case-study/refaktor-before/src/no/uio/ifi/refaktor/handlers/TreeSelectionInfoHandler.java

   1 package no.uio.ifi.refaktor.handlers;
   2
   3 import java.util.List;
   4
   5 import org.eclipse.core.commands.AbstractHandler;
   6 import org.eclipse.core.commands.ExecutionEvent;
   7 import org.eclipse.core.commands.ExecutionException;
   8 import org.eclipse.jdt.core.IMember;
   9 import org.eclipse.jdt.core.IType;
  10 import org.eclipse.jface.dialogs.MessageDialog;
  11 import org.eclipse.jface.viewers.ISelection;
  12 import org.eclipse.jface.viewers.ITreeSelection;
  13 import org.eclipse.ui.IWorkbenchWindow;
  14 import org.eclipse.ui.handlers.HandlerUtil;
  15
  16 public class TreeSelectionInfoHandler extends AbstractHandler {
  17
  18         @Override
  19         public Object execute(ExecutionEvent event) throws ExecutionException {
  20                 ISelection selection = HandlerUtil.getCurrentSelectionChecked(event);
  21                 IWorkbenchWindow window = HandlerUtil.getActiveWorkbenchWindowChecked(event);
  22                 String title = "Tree Selection Info";
  23
  24                 if (!(selection instanceof ITreeSelection)) {
  25                         MessageDialog.openInformation(window.getShell(), title, "Selection is not of type " + ITreeSelection.class.getCanonicalName());
  26                         return null;
  27                 }
  28
  29                 ITreeSelection treeSelection = (ITreeSelection) selection;
  30                 String message = "Selection type: " + treeSelection.getClass().getCanonicalName()
  31                                 + "\n\nType of selected element: " + treeSelection.getFirstElement().getClass().getCanonicalName()
  32                                 + "\nInterface type(s) for element:\n" + getAdditionalTypeInfoForElement(treeSelection.getFirstElement());
  33
  34                 List<?> elementList = treeSelection.toList();
  35                 if (elementList.size() > 1)
  36                         message += "\n\nElements:";
  37
  38                 for (Object element: elementList) {
  39                         message += "\n\nElement: " + element;
  40                         if (element instanceof IMember) {
  41                                 message += "\nElement name: '" + ((IMember) element).getElementName() + "'";
  42                                 IType declaringType = ((IMember) element).getDeclaringType();
  43                                 if (declaringType != null)
  44                                         message += "\nElement declared in type: " + declaringType.getFullyQualifiedName();
  45
  46                                 if (element instanceof IType)
  47                                         message += "\nElement fully qualified name: " + ((IType) element).getFullyQualifiedName();
  48                         }
  49                 }
  50
  51                 MessageDialog.openInformation(window.getShell(), title, message);
  52                 return null;
  53         }
  54
  55         private String getAdditionalTypeInfoForElement(Object element) {
  56                 String interfaces = "";
  57                 for (Class<?> iface: element.getClass().getInterfaces())
  58                         interfaces += iface.getCanonicalName() + "\n";
  59                 return interfaces;
  60         }
  61
  62 }